Use the confidence interval to find the estimated margin of error. Then find the sample mean. A store manager reports a confidence interval of (46.4,81.4) when estimating the mean price (in dollars) for the population of textbooks. The estimated margin of error is. (Type an integer or a decimal.) The sample mean is. (Type an integer or a decimal.) ...

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A: We have given- P(A) = 0.55 P(B) = 0.65 P(A & B) = 0.35 We have to find weather it is an…

Q: Two brother X and Y appeared for an exam. The probability of selection of X i: 1/7 and that of B is…

A: given data  P(X selected) = P(X) = 17P(Y selected) = P(Y) = 29P(both X and Y selected) = ?

Q: Many high school students take the AP tests in different subject areas. In one year, of the 144,651…

A: given data  n1 = 144651    x1 = 84698p^1 = x1n1 = 84698144651 = 0.5855 n2 = 214919    x2 = 125498p^2…

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A: Given: t = -1.467 n = 21 H1 : μ ≠ μ0

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Q: (Coneptual points) Suppose an individual is randomly selected from the population of all adult males…

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Q: Suppose you flip three coins. What is chance of not getting tails on all three flips?

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Q: In the Kruskal-Wallis test for the following data, what is the sum of the ranks for Sample Sample 1…

A: Given data: Sample 1 Sample 2 Sample 3 54 52 43 58 53 45 63 53     56

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A: 1. Suppose μ is the population average age of hospital patients.

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Q: Since an instant replay system for tennis was introduced at a major tournament, men challenged 1386…

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A: Note: As per guidelines only first 3 subparts have been answered if you need answers for the rest of…

Q: X y 16.9 95.3 67.6 46.6 54.9 67.1 76.4 50.7 40.9 74.8 33.7 68.6 What is the critival value for this…

A: By using above information    What is the critival value for this hypothesis test?   rc.v.=0.917…

Q: The Department of Education would like to test the hypothesis that the average debt load of…

A: given data sample size (n) = 34sample mean ( x¯ ) = 18200population standard deviation (σ) = 4200α…

Q: What is the estimated standard error of the means (Sm1-m2)?

A: Standard error of the difference of two means is given by,

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A:

Q: Two different simple random samples are drawn from two different populations. The first sample…

A: given data sample 1 : n1 = 40x1  = 20sample 2 : n2  = 2200x2 = 1573α = 0.05claim : p1 = p2

Q: a) What is the critical value? b) What is the pooled sample variance? c) What is the t

A: a) Given information: n1=11n2=10α=0.05df=n1+n2-2=11+10-2=19 Tail of the test: two tailed. Critical…

Q: A study was conducted on the percent of total advertising dollars spent by 4 local firms for…

A: Solution-: Given: n=4,∑di2=5 We want to find t-value=?

Q: Americans receive an average of 17 Christmas cards each year. Suppose the number of Christmas cards…

A: given datanormal distribution μ = 17σ = 5

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A: Z table has utilized to compute the value.

Q: The mean height of an adult giraffe is 17 feet. Suppose that the distribution is normally…

A: given data  normal distribution μ = 17σ = 0.9

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A: Let X: the total number of hours.the density fuction of a continuous random variable…

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Q: The null and alternative hypothesis would be: Ho:μ = 0.8 Ho:p = 0.8 Ho:p = 0.8 Ho:p = 0.8 Ho:μ = 0.8…

A: given data clim : p <0.80n = 500x = 370α = 0.10

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A:

Q: The population mean and standard deviation are given below. Find the required probability and…

A: GivenMean(μ)=216standard deviation(σ)=6.2sample size(n)=75

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Q: State Ho and H₂ in words and in symbols. Then determine whether the hypothesis test is left-tailed,…

A: Given A reports claim that lung cancer  accounts for at most  20% cancer diagnosis

Q: A boat capsized and sank in a lake. Based on an assumption of a mean weight of 142 lb, the boat was…

A: As per information i have to solve part(b) pf the given questions Mean(µ) = 178.5 Standard…

Q: Manual Transmission Automobiles In a recent year, 6% of cars sold had a manual transmission. A…

A: Solution-:  Given: n=123, x=21, c=0.99 We want to find the proportion of college students who drive…

Q: Elizabeth Mjelde, an art history professor, was interested in whether the value from the Golden…

A: The sample size for first sample is 37, sample mean is 1.74 and sample standard deviation is 0.11.…

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A: There is 14 red marbles and 34 blue marbles in the jar.

Q: Students want to study the propotion of people in their university community who have tested…

A: given data, n=780x= no. of positive =x=516CI=0.99α=1-0.99=0.01

Q: The average number of miles (in thousands) that a car's tire will function before needing…

A: given data normal distribution μ = 67σ = 17n = 49

Q: For normally distributed data, what is the area greater than z = 0.34?

A: Given: Z = 0.34

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Q: 0 df1=4 S

A: Given:                                  Standard Deviation (S1​) = 100…

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Q: Which is the stronger level of significance, 0.01 or 0.001?   a. 0.001 This is the probability of…

A: In statistics, level of significance Is defined as the probability of making type 1 error. Type 1…

Q: he mean height of an adult giraffe is 18 feet. Suppose that the distribution is normally distributed…

A: As per our guidelines I can solve only first three subparts. Kindly post the remaining subparts…

Q: If you read that the value of a Pearson r is 0.45, p = 0.09, should you have confidence that this…

A: Note : significance of correlation coefficient r is decided by p value.

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Q: The number of ants per acre in the forest is normally distributed with mean 42,000 and standard…

A: Given Mean=42000 Standard deviation=12217

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Q: In a recent survey, 59% of the community favored purchasing a new playground in their neighborhood…

A: It is given that 59% of the community favored purchasing a new playground in their neighborhood…

Q: Hospital Noise Levels Noise levels at various area urban hospitals were measured in decibels. The…

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Q: . For each of the following, determine the sample size needed to get the desired accuracy of the…

A: For the first part we have to find sample size needed when  margin of error, population standard…